Segment Data (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments of company | segment			2
Net sales	$ 231,989	$ 166,442	$ 645,803	$ 454,863
Cost of sales	87,422	68,202	239,954	179,838
Gross margin	144,567	98,240	405,849	275,025
Research and development	42,382	29,246	143,352	85,187
TASER
Segment Reporting Information [Line Items]
Net sales	121,491	84,406	333,018	230,791
Cost of sales	41,554	31,297	112,345	88,787
Gross margin	79,937	53,109	220,673	142,004
Research and development	10,476	3,355	32,032	10,149
Software and Sensors
Segment Reporting Information [Line Items]
Net sales	110,498	82,036	312,785	224,072
Cost of sales	45,868	36,905	127,609	91,051
Gross margin	64,630	45,131	185,176	133,021
Research and development	31,906	25,891	111,320	75,038
Product
Segment Reporting Information [Line Items]
Net sales	165,803	120,091	463,116	326,134
Cost of sales	71,336	57,798	195,253	150,507
Product | TASER
Segment Reporting Information [Line Items]
Net sales	118,569	83,517	326,508	228,569
Cost of sales	41,554	31,297	112,200	88,787
Product | Software and Sensors
Segment Reporting Information [Line Items]
Net sales	47,234	36,574	136,608	97,565
Cost of sales	29,782	26,501	83,053	61,720
Service
Segment Reporting Information [Line Items]
Net sales	66,186	46,351	182,687	128,729
Cost of sales	16,086	10,404	44,701	29,331
Service | TASER
Segment Reporting Information [Line Items]
Net sales	2,922	889	6,510	2,222
Cost of sales	0	0	145	0
Service | Software and Sensors
Segment Reporting Information [Line Items]
Net sales	63,264	45,462	176,177	126,507
Cost of sales	$ 16,086	$ 10,404	$ 44,556	$ 29,331